/// <summary>
/// Writes the RichText instance.
/// </summary>
public virtual void Write(RichText richText, int offset, int length)
{
foreach (var section in richText.GetHighlightedSections(offset, length))
{
BeginSpan(section.Color);
Write(richText.Text.Substring(section.Offset, section.Length));
EndSpan();
}
}